April 2011 \ Reviews \ Effects \ Mod Kits DIY Persuader Pedal Review

Mod Kits DIY Persuader Pedal Review

Jordan Wagner

An affordable but challenging DIY tube distortion pedal.


Premier Guitar April 2011



Download Example 1
Clip recorded with a 1978 Greco EG-700 into a Fender Twin Reverb combo reissue.
If there’s one underlying trait gearheads share, it’s a fascination with how things work. Whether it’s the magical combination of maple and mahogany, or the differences between brands and eras of 12AX7 preamp tubes, we’re utterly obsessed with the electrical components within the signal chains that produce our guitar tones.

That obsession is the basis for most small startups that design and produce our favorite boutique equipment. Interestingly, it has also spawned a branch of the industry that allows players to build gear for themselves. Mod Kits DIY is one of those companies, offering pedal and amp kits to players who have a taste for tinkering. With practically non-existent labor costs, Mod Kits DIY can afford to price their products well within the budgets of everyday players. Two of their kits—the Verb (also reviewed) and the Persuader—offer more than just time-honored reverb effects and tube overdrive. These kits also provide us the satisfaction of building our own tone generators.

The Persuader
A 12AX7-powered tube overdrive unit with Volume and Gain controls to shape its tone, the Persuader is essentially a tube preamp in a pedal form. For you tube circuit-enthusiasts out there, the 12AX7 operates in a starved plate mode, pushed by a solid-state gain boost circuit. The kit ships with an inexpensive Chinese 12AX7 tube, along with a detailed set of instructions that matched the heftiness of those included with the Verb kit. As with the Verb, Mod Kits recommends powering the Persuader from a 9V adaptor, though the pedal works with a 9V battery.

Seducing Tones
The Persuader’s circuit relies on the same tag-board, point-to-point build that the Verb shares, but it’s a much more intricate project due to the number of contact points that need to be soldered. Several board components share the same tag points, and therefore require having their leads bent and secured in place until other parts have been added many steps later.

One of the more frustrating aspects of assembling the kit was having to install small board components—such as resistors, transistors, and capacitors—then add wiring, and then follow that with yet more small components. This is where knowing how to neatly tuck wire really comes into play. Otherwise, it’s easy to let the whole shebang degenerate into a rat’s-nest of wires that can simply get in the way of your work.

It was a tedious process, but worth it in the end. After putting the Persuader between my 1978 Greco EG-700 and a Vox AC30CC2 combo, I half expected a smooth, low-key, tube distortion. But what I got was a snarling, vintage distortion with a fuzz-like bite in the upper registers. The tone stayed tight and percussive as I ranged up and down the neck with single-note funk riffs and seventh chords.

Because the Persuader uses a 12AX7 preamp tube, there was nothing stopping me from taming the device by replacing it with a lower gain 12AT7. This gave the Persuader more headroom and imparted a glassier sheen to the midrange and top end. Popping in a Groove Tubes Mullard ECC83 reissue darkened the tone considerably, nudging the Persuader into the realm of classic-rock fuzz. I would have appreciated a rotary tone control, but after building the kit I realized there would have been hardly enough room to fit another potentiometer in the enclosure.


The Verdict
For vintage distortion and fuzzy tones on a budget, the Persuader is an excellent choice. It’s not the easiest kit to build, but certainly one of the most rewarding. And, costing just below $65, the price is right too.
Buy if...
you’re after a simple tube distortion that can generate some great fuzz-like tones.
Skip if...
you need a more modern overdrive.
Rating...


Street $64.95 - Mod Kits DIY - modkitsdiy.com

Click here to read our review of The Verb...

     

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Comments

(10 comments) display by
UsernameComment
RMosack
on 04/11/2011
The option of trying different tubes sounds pretty cool - even in starved plate mode. Not a bad price for such a kit too.
Tom S
on 04/09/2011
The reason it's so fuzzy sounding is that you're putting the tube in a starved plate situation. Ideally, you'd want something like 200VDC on the plates of both triode sections, not 9VDC.
Tim Warner
on 04/08/2011
Chuck, I got one for Christmas . Love it . Swapped out tube for 12au7 and it turned it into an awsome (semi clean) boost! fun build also!
Stan
on 04/08/2011
Wow that sounds great! real tube sound I am going to get one. I Musicians Friend has them for sale.
Rebecca - Web Ed
on 04/07/2011
Sorry it took a bit to get this sound sample up, but it's there now.
Chuck
on 04/07/2011
Someone told me that you can swap out the 12AX7 for a 12AU7 I wonder haw that would change the sound
Peter
on 04/07/2011
Yeah they have a nice sample of The Verb I don't know why they don't have one for this?
Lex
on 04/07/2011
I checked out modkitsdiy.com and I see they have a few cool amp kits too
Frank
on 04/07/2011
Wow this so cool and cheap!
Chris
on 04/06/2011
Sample sound would be nice....



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